Swivel connection



D. M. PHlLLlPs swlvEL CONNECTION Aug. 22, 1944.

F11/ed Maron 1e, 41942 2 sheets-sheet 1 SWIVEL CONNECTION Filed Marvch 16. 1942 2 Sheets-Sheet 2 Patented Aug. 22, 1944 SWIVEL CONNECTIQN Dwight M. Phillips, Fullerton, Calif., asslg'nor to Chlksan Tool Company, Brea, Calif., a corporation of California Application March 16, 1942, Serial No. 434,877

1o claims.

This invention relates to swing joints or swivel joints and relates more particularly to huid conducting swivel joints. A general object of this invention is to pr'ovide a practical dependable uid conducting swivel joint that is compact and very long wearing.

Another object of this invention is to provide a fluid conducting swivel joint particularly well adapted for high speed installations where the speed of relative rotation of the sections is high and the joint embodies a reservoir containing 1ubricant or other liquid medium 1for maintaining the parts cool. A substantial body of lubricant, or the like, may be contained in the reservoir to prevent the development of high temperatures-as a result of high speed operation.

Another object of this invention is to provide a swivel connection of the character mentioned embodying an effective anti-friction bearing means connecting the sections for free relative rotation and f effective long wearing sealing means for sealing between the sections.

Another object of this invention is to provide a fluid conducting swivel joint of the character accessible for inspection, replacement and repair by merely removing a threaded plug or ring. Upon removing the retaining ring the bearing is immediately accessible for removal from the joint body and upon removal of the bearing the two body sections are separable to allow removal of the sealing means.

Another object of this invention is to provide a swivel joint of the character mentioned embodying a novel bearing retaining meansthat may be readily installed and locked in the position where the bearing is definitely and securel held in place.

A further object of this invention is to provide a. swivel connection of the character lreferred to that is simple in construction, compact and light tional view of another form of the invention. Fig. 35 is an enlarged fragmentary sectional view of the contact ring and Fig. 4 is a longitudinal detailed sectional view of still another form of the invention.

The embodiment of the invention illustrated in Figs. l and 2 of the drawings may be said to comprise, generally, two body sections A and B adapted to be connected with pipe parts or tubes T and T', anti-friction bearing means I0 connecting the sections A and B for free relative rotation, and sealing means Il for preventing the leakage of fluid from between the sections Aand B.

The body sections A and B are adapted to be interposed in a fluid handling line or tube. The section A is the inner section of the joint and is an elongate tubular member of uniform internal diameter. The external surface of the section A is shaped to carry the bearing means I0 and the sealing means I l.

In the preferred constructionthe section A has an external annular flange I2 spaced between its ends to form an-abutment for the bearing means l0 and the sealing means Il. The tubular inner section A is secured on the tube T.

In the case illustrated the tube T passes completely through the section A and extends a considerable distance beyond the' section. l

The section B is the outer part or element of the'joint and surrounds the section A with clearance. The section B is an elongate tubular member whose'major portion surrounds the section A with a large amount of clearance to provide a space for containing the cooling and lubricating medium and for housing or containing the bearing means I0 and the sealing means Il. 'An end wall I3. is provided on what may be termed vthe inner end of the section B. The wall i3 extends radially inward toward the section A but terminates short of the section A. An annular or tubular wall I4 projects longitudinally or axially from the wall Il and surrounds the section A with substantial clearance leaving a space to receive the sealing means Il, as will be later described. The wall I4 is spaced a substantial distance from the main or outer wall of the tubu- 'lar section B leaving an annulus or space which 4forms the reservoir for the cooling and lubricating medium. Ther wall I4 terminates a short distance from the ange I2 leaving an annular gap -which is vclosed by the sealing means Il, as will be later described.` AThe outer wall of the section B has an annular inturned shoulder I6 on Fig. 1. Fig. 3 is a longitudinal ldetailed secu lying in the same transverse plane as the outer side of the flange I2 and facing in the same direction as said outer side.

The section B may be associated with the tube T' in any selected or required manner. In the case illustrated the end wall I3 has a counterbore II in which a tubing section I3 is secured. The tubing 'section I3 surrounds the projecting end portion oi the tubing T with considerable clearance, leaving an annulus for receiving a shock absorbing means for absorbing pulsations in the fluid line, the shock abwrbing means not being shown as it forms no part of the present invention. The tubing T is suitably secured to the outer end of the section I3.v

The anti-friction bearing means Il serves to connect the sections A and B for free relative rotation. The means Il comprises a suitable bearing engaged between the sections A and B. This bearing is preferably in the form of a ball bearing comprising an inner race I3, an outer race and a series of balls 2| engaged between the races I! and 20. In this form of the invention the bearing is designed for high speed operation, that is, it is constructed to connect the sections A and B for relative rotation at high speeds. Retaining rings 22 are set or secured in the outer race 2l and engage with the inner race I3 to seal the interior of the bearing against the entrance` of dirt and foreign matter and to prevent the escape of the lubricant with which the bearing is packed. The bearing is in surrounding relation to the section A and is within the section B. The internal surface of the inner race I3 bears on the section A, while the external surface oi the outer` race 23 fits in the internal surface ci the section B. The anti-friction bearing abuts or engages against the flange I2 and the shoulder I6. The inner race I3 bears inwardly against the end face of the flange I2. while the end of the outer race 23 bears against the shoulder I6. Thus, the anti-friction bearing is positively supported against inward axial movement with respect to the two tubular sections A and B. A safety lock ring 23 is provided to prevent outward movement oI the bearing III when the joint is being taken apart or is partially assembled. The lock ring 23 is a split annular spring ring engaged in an annular groove 24 in the section A and cooperates with the end of the inner bearing race I3.

The invention provides novel and eifective means for positively securing the bearing means I0 in the section B that is such that the bearing means and the sealing means II may both be made readily accessible for inspection, repair and replacement by simple operations. This means includes an annular nut or ring 23n threaded in the outer portion of the section B. The inner end of the ring 23 opposes the anti-friction bearing. The inner end ofthe ring 23I is spaced from or outward of the anti-friction bearing. A washer or thrust member 2l is interposed between the inner end of the ring 23* and the anti-friction bearing. This thrust member is generally L shaped in transverse cross section, being relieved at its inner side to receive the safety ring 23 with substantial clearance. Because of this configuration of the thrust member 25 the member may be entirely clear of and spaced from the inner race I3. It will be seen that the ring 23 may be threaded inwardly to tightly hold the antifriction bearing against .the ilange I2 and the shoulder I6. 'I'he thrust member 23 directly bears against the end face of the outer race 20.

It is preferred to provide means on the ring 23'* for sealing with the section A to prevent the inward passage oi dirt and other foreign material and to prevent the escape of lubricant from the joint. This sealing means is contained in an inwardly facing'A counterbore 23. The sealing means or element includes a frame or carrier 21 of metal, or the like, and a sealing part 23 of rubber, synthetic rubber, or the like, contained in the carrier 2l. The carrier 21 has an inturned' l0` lip 23 at its inner end which maintains an L shaped ring in the carrier 21. The end of the carrier 21 and its lip 23 engage against the thrust member 23. In other words, the thrust member 25 serves to hold the carrier 21 in position within the counterbore 23. The sealing part 23 is shaped to have effective sealing engagement with the section A and is capable ot preventing the outward or inward passage o! uid and material. Thus, the anti-friction means I3 is protected against outsidedirt which may have a tendency to enter the Joint and the lubricant within the joint is prevented from leakin! out.

The invention provides novel means for locking or holding the threaded ring 23* in the position where it holds the thrust member 25 in tight engagement with the bearing race 23 so that the bearing is securely clamped between the member 25 at one end and the shoulder I6 and flange I2 at the other end. 'I'his means comprises an annular groove 3| formed in the exterior of the section B adjacent its outer end. A plurality oi radial openings 32 pass inwardly through the wall of the section B from the groove 3l. The openings 32 are equally spaced throughout the circumference of the section B. A plurality of slots 33 is provided in the end of the nut or ring 23. The slots 33 are likewise equally spaced circumferentially but differ in number from the openings 32. The slots 33 are of substantial circumierential extent. A lock ring or spring ring 34 is arranged around the section B to engage In the groove 3I. One end portion of the ring 33 is bent or turned in to be substantially radial and to form a lock lug or ilnger 3l. The finger 35 is passed through one of the openings 32 to engage in one of the slots 33 and thus lock the threaded ring 23 against rotation in the position where the bearing means III is secureLv held in place.

It is a feature of the invention that the width of the slots 33 is related to the number and spacing of the openings 32 so that there is an opening 32 in registration with a slot 33 at any and every rotative position of the threaded ring 23. Thus, in the case where there are nine equally spaced openings 32 in the body section B and four equally spaced slots 33 in the ring 23 the slots are each slightly more than 5 in circumferential extent. In such a case the equal spacing of the nine openings 32 provides that there is always at least one opening 32 in registration with one of the slots 33. It is to be understood that the number of openings 32 and slots 33 may vary vin different cases but the relationship is always auch that there is at least one opening 32 in registration with a slot 33 with the ring 23 in any rotative position. The importance of the structure just described resides in the fact that the threaded ring 23 may be tightened in against the thrust member 2l so that the bearing vis tightly clamped in place and the ring 23 may be dependably locked or set in the position where the bearing is tight. This makes it unnecessary to hand nt the threaded ring 23 to provide for the correct retention of the anti-friction bearing.

The sealing means II serves to prevent the leakage of fluid under pressure from between the sections A and B. The sealing means II comprises a sealing ring assembly inthe space or annulus between the wal1.I4 and the section A. In the preferred construction the sealing ring assembly includes an inner ring 36 of brass or other selected rigid material arranged against the side surface of the flange, I2. The inner ring 36 is of chevron shape and the side of the flange I2 may be correspondingly shaped to provide dependable' support for ythe ring. A plurality of sealing rings 31 is arranged in front of the inner ring 36. VThe sealingk ringsY 31 are chevron shaped and the innermost sealing ring conforms to and bears against the ring 36. The sealing rings 31 may be formed of any selectedsealing material such as synthetic rubber, or the like.

The wings or lips of the sealing rings 31 bear and seal against the internal surface yof the wall I4 and the periphery of the sectionA. The rings 31 face outwardly so that they are actuated or expanded by line'pressure as will be more fully described. An outer rigid ring 36 engages in the outermost sealing ring 31gand is shaped to conform generally to the sealing ring, One or more sealing washersl 39 are arranged in front of the ring 38 to prevent the outward leakage Lor escape of the cooling. and lubricating medium contained in the reservoir I5.Y The washers 39 are formed of felt, or the like, and maintain effective sealing contact with the periphery of the section A- and the inner surface ofthe wall I4. 39. The inner washerl 39 is arranged against the rigid ring 36. vWashers 40 of metal, or the like, are' arranged at opposite sides of the outermost ring 39,`the inner washer 40 being between the two felt washers 39. The rigid rings 40 and the ring 38 serve to 'prevent excessive distortion of the felt sealing washers 39 and to maintain peripheries of the rings in sealing engagement with the wall I4 and thesection A.

The invention provides spring means for maintaining the sealing ring assembly under compression to be effective in sealing between the sections A and B. A spring 4I' is arranged under compression between the outermost washer 40 and an internal flange 42 of the section B. The flange 42 may occur at the inner end of the counterbore I1. The spring 4I serves to urge the sealing ring ass embly`inwardly and holds it in Q position. Further, the spring 4I assists in actu` ating or compressing the sealing rings 31 and washers 39.

In accordancewith the invention the line pressure, that is, the fluid pressure within the tubes T and T is utilized yto actuateor expand the sealing rings. The flange 42, mentioned above, is

spaced from and clear 'of the Section A leaving an annular gap or 'space 43 which puts Ithe interior of the tube section I8 incomfnunication with the annulus in which the, sealing means II is disposed. The interior of the section I6 is in communication with thefluid handling line so that the sealing means II. One or more ports 44 may be formed in the inner ring 36. The ports 44 place the reservoir I5 in communication with the annular space which carries the series of rings 31 and the lubricant or liquid medium contained in the reservoir I5 is delivered to the sealing rings 31 to lubricate the same.

The form of the invention illustrated in Fig. 3 of the drawings comprises, generally, an inner section A', an outer section B', means I0 connecting the sections for free relative rotation, means II for sealing between the sections A' and B and means X for maintaining an effective electrical connection between the sections A and B.

The section A maybe substantially the same as the above described section A, being an elongate tubular member secured on the tube T.

The` exterior of vthe section A' .has an annular flange I2 and the flange is spaced between the ends of the section.

The section B' is an elongate tubular member similar, generally, to the above described section B. The section B surrounds the section A' with substantial clearance leaving an-annulus for receiving the means I0, the sealing means II- and otherelements. The inner end of the section .B' has a radial or transverse wall I3 and a radial flange 45 projects outwardly from the wall I3. A tubular or annular wall I4 projects axially inwardly from the end wall I3 and isk in concentric surrounding relation to the section In the case illustrated there are two washers section B.

A. The wall I4 surrounds the section A with substantial clearance leaving an annulus or space for the sealing means II, A head or flange member 46 is provided on the inner end of the The member 46 has a radial flange 41 which is complementary tothe flange 45 and bolts 43 are passed through openings in the flanges and 41 to secure the'member 46 to the section B'. The member 46 has a tubular `'flanged or ribbed boss 49 which fits within the wall I3 to locate orcentralize the member 46.

the assembly of sealing rings is exposed to the action of the fluid pressure. It will be seen ho'w the fluid pressure from the line acting on the outermost ring of washerv 40 yexerts an actuating or compressing force on the series of sealing rings 31 and the washers 39. v

Where the joint is to be subjected to high scribed above.

speed operation it may be preferred to lubricate The inner side of the member 46 ls spaced from the opposing end o'f the section A leaving an annular gap 43 for the purpose y-to be later described. The member 46 may be suitably secured toa pipe or tube part L. In the case illustrated the member 46 has a tubular hub or boss 50 reecived in the end portionof the tubular part L and welding, brazing or soldering 5I secures the member 46 to the tube part L and maintains a seal. 1

The above mentioned tubular wall I4il of the section B' is spaced a considerable distance in, wardly from the outer wall of the section B' leaving an annular space or reservoir I5 for the cooling medium` The wall I4a terminates short4 of the transverse plane occupied by the flange I2". An shoulder I6 is provided on the main or body wall of the section B. The shoulder I6 is in or adjacent the plane occupied by thelflange. I2 and is spaced forwardly from the annular wall I4".

The anti-friction means I0 for connecting the sections A and B for free relative rotation may be substantially thel samejas the means I0 de# The means I0 comprises an anti-friction bearing made up of an inner race I9,van outer race 20 and a row ofballs 2lII enga'ged between the races.` The inner race I9 flts .on the section A, while the outer racev 20 fits within a bearing retainer '52. The bearing retainer 52 vin turn fits within the wall of the sec-- internal outwardly facing annular.

tion B' and its end bears against the shoulder I5. The retainer 52 is L shaped in transverse cross section to effectively support and retain the bearing. A safety lock ring 23* is sprung into an annular groove in the section A and engages with the outer end of the inner bearing race I9a to hold the bearing in place.

The means for clamping or securing the antifriction bearing means I0 in position may be the same as in the previously described form of the invention, comprising a thrust member 25* for bearing against the outer race and the retainer 52, a nut or ring 23c threaded in the outer portion of the section B and clamping against the member 25 and the lock ring 34 arranged in the groove 3la and having a finger 35 passinlr through one of the opening 32 and engaging in one of the notches 33B. The nut or ring 23C supports the sealing ring l which is contained by the retainer 21a, all as above described.

The sealing means IIa may be the same as in the preceding form of the invention. The sealing means II is contained in the annular space between the wall I4 and the section A and comprises the inner ring 35, the plurality of sealing rings 31, the outer rigid ring 38, the felt washers 39 and the metal washers 40. A spring 4I is arranged under compression between the inner side of the member 46 and the outer washer 40 to hold the sealing assembly and to actuate the sealing rings 31 and to compress the felt washers 39. The sealing assembly is expanded or actuated by line pressure admitted into the section B' by the gap 43a. The means IIl operates as in the preceding form of the invention, the sealing rings 31 being effective in preventing the outward leakage of fluid under pressure from between the sections A and B' and the washers 39 being effective in preventing the inward leakage of 'the lubricant or cooling fluid. The inner ring 35 has one or more ports 44 for admitting the lubricant or cooling uid to the rings 31 to lubricate the same. The fluid admitted by the ports 44 effectively lubricates the sealing rings 31. The felt washers 39 prevent the leakage or escape of this lubricating fluid into the line.

I'he means X operates to maintain a continuous and adequate electrical connection between the relatively rotatable sections A' and B'. The means X includes a tube 54 of suitable conductive material such as brass, copper, or the like, secured within the section A' to project from its inner end. The tube 54 may be force fitted or otherwise secured in the section A and may directly abut against the end of the tube T. The means X further includes a contact ring 55 of steel or other conductive material fixed in the member 46. The ring 55 may be suitably secured in a counterbore in the inner side of the member 45 to directly oppose the end of the section A. The portion of the tube 54 which projects from the section A extends into the contact ring 55. The tube 54 and contact ring 55 are constructed to assure an effective and adequate engagement. The interior of the ring 55 may have a flaring or conical surface 55. The surface 55, in most cases, does not extend throughout the full length of the ring 55 and leaves a cylindrical surface 51 to be engaged by the tube 54. The longitudinal extent of this surface 51 is determined by the extent of the conical surface 55. The extent of engagement between the contact ring 55 and the tube 54 may be varied by increasing or decreasing the length of the conical surface 55.

The projecting end portion of the tube 5.4 has circumferential spaced longitudinal slots 58 providing a multiplicity of resilient fingers. Prior to the assembling of the joint these fingers are flaring and when the joint is assembled the resiliency of the fingers holds their outer surfaces in contact with the cylindrical surface 51 of the contact ring 55. Thus, a continuous adequate electrical connection is maintained between the sections A' and B. The slots 55 communicate with the gap 45l so that the annulus between the wall I4l and the outer wall of the section B' is maintained in continuous communication with the line so that the line pressure is maintained on the sealing means II.

Means may be provided for facilitating the provision or filling of the cooling and lubricating fluid in the reservoir I5. A longitudinal port 59 'may be formed in the end wall I3'A of the section B' and a registering port 50 may be formed in the flange 41. A threaded plug 5I normally closes the port 55.

The joints illustrated in Figs. 1, 2, 3 and 3l are adapted for high speed rotation and the Ylubricant contained in the reservoir I5 or I5* serves to maintain the parts cool. The cooling and lubricating fluid also lubricates the sealing means II and II'A and, if desired, may lubricate the anti-friction means I0 or Ill. The anti-friction means I9 and III connect the sections for rotation with a minimum of friction and are sturdy and long wearing. The bearing means is readily made accessible for repair or replacement by removing the threaded ring 23c and following this the sealing means II and II* may be made accessible for inspection, repair and replacement by relative longitudinal movement between the sections A and B. In the case of the structure illustrated in Fig. 3 it may be desired to detach the member 46 from the section B' to make the sealing means IIL accessible for repair and replacement.

The joint illustrated in Fig. 4 comprises, generally, a section A, a section B, anti-friction bearing means I0h lconnecting the sections A and lz for free relative rotation, sealing means I Ib for sealing between the sections A2 and Bz and the means X for maintaining an electrical connection between the sections.

The section A2 is an elongate tubular member and may be of uniform internal diameter throughout its length. An annular radial flange I2 may be provided on the exterior of the section A"l at a point between the ends of the section. A coupling part 54 may be provided on the outer end of the section A2. In the case illustrated this part 54 carries an external thread for engagement with a pipe coupling, union, or the like, and is secured to the end of the section A2 by welding, soldering or brazing 55. When the part 54 is secured to the section Az in this manner it is preferred to provide a tube 55 within the opposing end portions of the section A2 and the part 54 to maintain accurate alignment, a uniform internal diameter and a complete electrical connection.

The section B2 is an elongated tubular member 4which surrounds the section A2 with substantial clearance to leave an annulus which receives the means I0h and Il". An annular radially projecting flange 53 is provided on what I will term the inner end of the section B. The interior of the section B2 is generally uniform in diameter except for an annular shoulder I5h which faces toward the outer end of the section. A member fixed ,in the inner side of the member I6.

.IGP is secured to theilanged inner end of the section B2. This member 46V has a flange 61 mating with the flange 63 and screws or bolts 58 are passed through registering openings in the flanges 63 and V61 to secure the member 4Gb to the section B2. The `hub portion of the member 46h ts within the section B2 and has a flange 49 continuing into the section. The member 4Gb is formed for connection with a pipe part. In the case illustrated the member 6b has a reduced portion ,B9 which is received in a pipe part 10 andl which is welded, soldered or brazed Ato the body at 1i. The inner side of the member 46h is spaced from the opposing end of the section A2 leaving an annular gap 3b for the purpose to be later described.

`The means lob comprises an anti-friction bearing made up of an inner race I9", an outer race 2Gb and a series of balls 2 Ib engaged betweenl the races. The bearing surrounds the .section A2 within the section B2, the inner race I9 directly engaging around the section A2 and the outer race b directly engaging in the section B2. The inner race I9b bears against the flange I2b'of the section A2, while the outer race 20b bears against the shoulder I6b of the section B2. A safety lock ring 23" is seated in a groove in the section A2 and engages against the outer end of the race i9b to hold the bearing against outward displacement. y

yThe `bearing justdescribed may be held or secured in position by the lsame means as employed in the previously described forms of the invention and corresponding reference numerals are applied to the corresponding elements of this means. It will be observed that the thrust member 25 urged inwardly by the ring 23tightly` clamps the bearing against the flange 12b and theshoulder I6".

In the form of the invention illustrated in Fig. 4 the` sealing means Il sealsk directly between the external surface of the section A2 and the internal surface of the section B2. meansv Ilh may comprise the sealing ring assembly described above which includes the inner metal ring 36, the sealing rings 31 of synthetic rubber, or the like, the outer rigid ring k38, the felt washers 39 and the metal washers 40. The Wings or lips of the sealing rings 31 seal with the external surface of the section Aa and the internal surface of the section B2 and the felt washers 39 likewise seal between the surfaces to prevent the outward leakage of lubricant, etc. The sealing ring assembly is actuated b y the line pressure admitted to the interior of the section B2 through the gap 43h and the spring I lb assists in compressing or actuating the sealing ring assembly and holds the assembly in place. The spring Hb is engaged between the inner side of the Amember 46" and the outermost washer 40 and is centered by the flange'49? of the member.

'I'he means X may be the sameas in Fig. 3 comprising a contact tube 54 in the section A2 and a contact ring 55 in the member 46h. The tube 5l is force fitted or otherwise secured in the section A2 and its inner end contacts the end of the tube 66. 'I'he projecting end portion of the tube 5I has the spaced slots 5B leaving resilient ngers which bear on the cylindrical surface 51 of the contact ring 55. The ring 55 is The slots 58 communicate with the gap 43" so that fluid pressure from the line is admitted to the interior of the section B2 to actuate the sealing means l I.

Having described typical preferred forms 'and applications of my. invention, I do not wish to be limited or restricted to the specic details herein set forth, but wish to reserve to myself The' any variations or modifications that may appear to thoseskilled in the art or fall within the scope ofthe following claims.

Having described my invention, I claim;

1. A swivel joint to be connected between fluid handling parts comprising a tubular outer sec' tion to be connected with one of said fparts and having an internal shoulder, a. tubular inner seotion to be connected with the other of said parts and extending into the outer section, an external flange on the inner section, an anti-friction bearing engaged between the sections and having one end engaging against said shoulder and one side of the flange, a ring removably threaded in the outer section and clamping the bearing` inwardly against said lshoulder and saidvside of the flange so that the bearing connects the sections for relative rotation and `prevents relative axial movement between the sections, sealing means at the othervside of said flange, and means for directing fluid pressure against the sealing means to actuate the same and to compress the sealing means against said other side ofthe flange.

2. A swivel joint to be connected between fluid handling parts comprising a tubular outer section to be connected with one of Vsaid parts and having an internal shoulder, a tubular inner section to be ccnnectedwith the other of said parts and extending into the outer section, an external flange on the irmer section, an antifriction bearing engaged between the sections and having one end engaging against said shoulder and one side of the ange, a ring removably threaded in the outer section and clamping the bearing inwardly against said shoulder and said side of the flange so that the bearing connects the sections for relative rotation and prevents relative axial movement between l the sections, rsealing means engaged against the other side of said flange, spring means for holding the sealing means against said other side of the flange, and means for directing fluid pressure against the sealing means to actuate the same. l

3. A swivel joint to bey connected between fluid handling parts comprising a tubular outer section to be connected with one of said parts and having an internal shoulder, a tubular inner section to be connected with the other of said parts and extending into the outer section, an external flange on the inner section, anantifriction bearing engaged between the sections and having one end engaging the shoulder and one side of the ange,`a ring removably threaded in the outersection and clamping-the bearing inwardly against said shoulder and said side of the flange so that the bearing connects the sections for relative rotation and prevents relative axial movement between the sections, a tubular axial wall projecting inwardly from anend of the outer section toward said vflange and spaced radially inward from the main circumferential w'ali of the outer section to leave a reservoir for cooling medium, and spaced radially outward from'the inner section, and sealing means between the axial wall and the inner section and bearing against the other side of said flange to seal between the sections.

4. A swivel joint to be connected between fluid handling parts comprising a tubular outer section to be connected with one of said parts and having an internal shoulder, a tubular inner section to be connected with the other of said parts and extending into the outer section, an external ange on the inner section, an anti-friction bearing engaged between the sections, a ring removably threaded in the outer section and clamping the bearing inwardly against said shoulder and one side of the iiange so that the bearing connects the sections for relative rotation and prevents relative axial movement between the sections, a tubular axial wall projecting inwardly from an end of the outer section toward said iiange and spaced radially inward from the main circumferential wall of the outer section to leave a reservoir for cooling medium, and spaced radially outward from the inner section, and sealing means between the axial tubular wall and the inner section and bearing against the other side of said flange to seal between the sections. there being a space between said tubular axial wall and said flange whereby the sealing means is exposed to and lubricated by said medium.

5. A swivel joint to be connected between iiuid handling parts comprising a tubular outer section to be connected with one oi' said parts and having an internal shoulder, a tubular inner section to be connected with the other of said parts and extending into the outer section, the inner section having an external shoulder, an antii'riction bearing between said sections, a ring threaded in one end of the outer section and clamping the bearing against said shoulders so that the bearing connects the sections for relative rotation, an axial tubular wall projecting inwardly from the other end oi the outer section in spaced surrounding relation to the inner section, and sealing means between said wall and the inner section for preventing the leakage oi.' fluid from between the sections.

6. A swivel joint to be connected between iiuid handling parts comprising a tubular outer section to be connected with one ot said parts and having an internal shoulder, a tubular inner section to be connected with the other of said parts and extending into the outer section, the inner section having an external shoulder, an antifriction bearing between said sections, a ring threaded in one end of the outer section and clamping the bearing against said shoulders so that the bearing connects the sections for relative rotation, an axial tubular wall projecting inwardly from the other end of the outerv section in spaced surrounding relation to the inner secand clamping the bearing against said shoulders so that the bearing connects the sections for relative rotation, an end member removably secured to the other end ot the outer section and having a tubular axial wall projecting into the outer section in spaced relation to the circumferential wall o! the outer section leaving a reservoir space for cooling medium, and sealing means sealing between said axial wall and the inner section to prevent leakage from between the sections.

B. A swivel joint in be connected between fluid handling parts comprising a tubular outer section to be connected with one oi said parts and having an internal shoulder, a tubular inner section to be connected with the other o! said parts and extending into the outer section, the inner section having an external shoulder, an anti-friction bearing between said sections, a ring threaded in one end oi the outer section and clamping the bearing against said shoulders so that the bearing connects the sections for relative rotation, an end member removably secured to the other end of the outer section and handling parts comprising a tubular outer section to be connected with one oi said parts and having aninternal shoulder, a tubular inner section to be connected with the other of said parts and extending into the outer section, the inner section having an external shoulder, an antifriction bearing between said sections, a ring threaded in one end ot the outer section and clamping the bearing against said shoulders so that the bearing connects the sections for relation, and sealing means between said wall and -tion to be connected with one of said parts and having an internal shoulder,` a tubular inner section to be connected with the other of said parts and extending into the outer section, the inner section having an external shoulder, an anti-friction bearing between said sections, a ring threaded in one end oi the outer section tive rotation, an end member removably secured to the other end of the outer section, and sealing means for sealing between the sections accessible upon removal of said member.

10. A swivel joint to be connected between fluid handling parts comprising a tubular outer section to be connected with one of said parts and having an internal shoulder. a tubular inner section to be connected with the other of said parts and extending into the outer section, the inner section having an -external shoulder, an anti-iriction bearing between said sections, a ring threaded in one end of the outer section and clamping the bearing against said shoulders so that the bearing connects the sections for relative rotation, an end member removably secured to the other end oi the outer section, and sealing means for sealing between the sections accessible upon removal of said member, said member being spaced from the adjacent end of the inner section leaving a gap so'that nuid pressure may actuate the sealing means.

DWIGHT M. PHILLIPS. 

